21113004210 has 32 divisors (see below), whose sum is σ = 51627274560. Its totient is φ = 5523905088.

The previous prime is 21113004173. The next prime is 21113004221. The reversal of 21113004210 is 1240031112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21113004210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6637720 + ... + 6640899.

It is an arithmetic number, because the mean of its divisors is an integer number (1613352330).

Almost surely, 2^21113004210 is an apocalyptic number.

21113004210 is an abundant number, since it is smaller than the sum of its proper divisors (30514270350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113004210 is a wasteful number, since it uses less digits than its factorization.

21113004210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13278682.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21113004210 its reverse (1240031112), we get a palindrome (22353035322).

The spelling of 21113004210 in words is "twenty-one billion, one hundred thirteen million, four thousand, two hundred ten".